/*
 * Copyright (c) 2014 North Carolina State University
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Scott E. Carpenter <scarpen@ncsu.edu>
 *
 */

#include "ns3/wave-bsm-stats.h"

#include "ns3/integer.h"
#include "ns3/log.h"

namespace ns3
{

NS_LOG_COMPONENT_DEFINE("WaveBsmStats");

WaveBsmStats::WaveBsmStats()
    : m_wavePktSendCount(0),
      m_waveByteSendCount(0),
      m_wavePktReceiveCount(0),
      m_log(false)
{
    m_wavePktExpectedReceiveCounts.resize(10, 0);
    m_wavePktInCoverageReceiveCounts.resize(10, 0);
    m_waveTotalPktExpectedReceiveCounts.resize(10, 0);
    m_waveTotalPktInCoverageReceiveCounts.resize(10, 0);
}

/* static */
TypeId
WaveBsmStats::GetTypeId()
{
    static TypeId tid = TypeId("ns3::WaveBsmStats")
                            .SetParent<Object>()
                            .SetGroupName("Stats")
                            .AddConstructor<WaveBsmStats>();
    return tid;
}

void
WaveBsmStats::IncTxPktCount()
{
    m_wavePktSendCount++;
}

int
WaveBsmStats::GetTxPktCount() const
{
    return m_wavePktSendCount;
}

void
WaveBsmStats::IncExpectedRxPktCount(int index)
{
    m_wavePktExpectedReceiveCounts[index - 1]++;
    m_waveTotalPktExpectedReceiveCounts[index - 1]++;
}

void
WaveBsmStats::IncRxPktCount()
{
    m_wavePktReceiveCount++;
}

void
WaveBsmStats::IncRxPktInRangeCount(int index)
{
    m_wavePktInCoverageReceiveCounts[index - 1]++;
    m_waveTotalPktInCoverageReceiveCounts[index - 1]++;
}

int
WaveBsmStats::GetRxPktCount() const
{
    return m_wavePktReceiveCount;
}

int
WaveBsmStats::GetExpectedRxPktCount(int index)
{
    return m_wavePktExpectedReceiveCounts[index - 1];
}

int
WaveBsmStats::GetRxPktInRangeCount(int index)
{
    return m_wavePktInCoverageReceiveCounts[index - 1];
}

void
WaveBsmStats::SetTxPktCount(int count)
{
    m_wavePktSendCount = count;
}

void
WaveBsmStats::SetRxPktCount(int count)
{
    m_wavePktReceiveCount = count;
}

void
WaveBsmStats::IncTxByteCount(int bytes)
{
    m_waveByteSendCount += bytes;
}

int
WaveBsmStats::GetTxByteCount() const
{
    return m_waveByteSendCount;
}

double
WaveBsmStats::GetBsmPdr(int index)
{
    double pdr = 0.0;

    if (m_wavePktExpectedReceiveCounts[index - 1] > 0)
    {
        pdr = (double)m_wavePktInCoverageReceiveCounts[index - 1] /
              (double)m_wavePktExpectedReceiveCounts[index - 1];
        // due to node movement, it is
        // possible to receive a packet that is not slightly "within range" that was
        // transmitted at the time when the nodes were slightly "out of range"
        // thus, prevent overflow of PDR > 100%
        if (pdr > 1.0)
        {
            pdr = 1.0;
        }
    }

    return pdr;
}

double
WaveBsmStats::GetCumulativeBsmPdr(int index)
{
    double pdr = 0.0;

    if (m_waveTotalPktExpectedReceiveCounts[index - 1] > 0)
    {
        pdr = (double)m_waveTotalPktInCoverageReceiveCounts[index - 1] /
              (double)m_waveTotalPktExpectedReceiveCounts[index - 1];
        // due to node movement, it is
        // possible to receive a packet that is not slightly "within range" that was
        // transmitted at the time when the nodes were slightly "out of range"
        // thus, prevent overflow of PDR > 100%
        if (pdr > 1.0)
        {
            pdr = 1.0;
        }
    }

    return pdr;
}

void
WaveBsmStats::SetLogging(bool log)
{
    m_log = log;
}

bool
WaveBsmStats::GetLogging() const
{
    return m_log;
}

void
WaveBsmStats::SetExpectedRxPktCount(int index, int count)
{
    m_wavePktExpectedReceiveCounts[index - 1] = count;
}

void
WaveBsmStats::SetRxPktInRangeCount(int index, int count)
{
    m_wavePktInCoverageReceiveCounts[index - 1] = count;
}

void
WaveBsmStats::ResetTotalRxPktCounts(int index)
{
    m_waveTotalPktInCoverageReceiveCounts[index - 1] = 0;
    m_waveTotalPktExpectedReceiveCounts[index - 1] = 0;
}

} // namespace ns3
